Company: Vagan Oil & Gas Limited
Location: Lagos
Job Type: Full Time
Apply Before: 2026-09-01
Job Description
Job Summary
We are seeking a highly skilled and experienced Senior Microsoft Windows and VMware vSphere Administrator to join our Infrastructure and Operations team. The successful candidate will be responsible for the design, implementation, administration, optimization, and support of enterprise Microsoft Windows Server environments and VMware virtualization platforms.
This role requires deep technical expertise in Windows Server technologies, VMware vSphere, Active Directory Services, virtualization, storage, backup and disaster recovery, cloud integration, and infrastructure security. The successful candidate will also play a key role in supporting infrastructure projects, application implementations, and digital transformation initiatives across the enterprise.
The ideal candidate will possess excellent troubleshooting skills, strong infrastructure design experience, and the ability to provide technical leadership in large-scale enterprise environments supporting business-critical applications and services.
Key Responsibilities
Windows Server Administration
Design, deploy, administer, and support Microsoft Windows Server environments.
Manage enterprise Active Directory infrastructure, including Domain Controllers,
Group Policies, DNS, DHCP, and Federation Services.
Administer Microsoft Windows Server 2016, 2019, 2022, and future releases.
Perform server patching, upgrades, security hardening, and lifecycle management.
Implement and maintain Windows security policies and compliance standards.
Monitor and optimize system performance, availability, and reliability.
Manage Windows Failover Clustering and High Availability solutions.
Troubleshoot and resolve complex Windows infrastructure issues.
VMware vSphere Administration
Design, deploy, administer, and maintain VMware environments including:
VMware ESXi
VMware vCenter Server
VMware Clusters
VMware Distributed Switches
Resource Pools
VMware HA
VMware DRS
VMware vMotion
VMware Storage vMotion
Provision, optimize, migrate, and decommission virtual machines.
Perform virtualization capacity planning and performance optimization.
Ensure high availability and resilience of virtualization platforms.
Cloud and Hybrid Infrastructure
Support hybrid infrastructure solutions integrating on-premises systems with
Microsoft Azure.
Manage Azure virtual machines, storage, and identity services.
Support cloud migration and modernization initiatives.
Implement cloud governance, security, and operational best practices.
Infrastructure Security and Compliance
Implementserver and virtualization security baselines.
Remediate infrastructure vulnerabilities and security findings.
Support Identity and Access Management IAM initiatives.
Collaborate with Cyber Security teams to strengthen infrastructure security.
Ensure compliance with corporate IT, audit, and regulatory requirements.
Monitoring a n d Performance Management
Administer infrastructure monitoring and alerting platforms.
Proactively monitor infrastructure health and system availability.
Perform root cause analysis for major incidents.
Identify and implement performance improvements.
Support problem management and continuous service improvement initiatives.
Automation and Process Improvement
Develop automation solutions using:
PowerShell
VMware PowerCLI
Infrastructure management tools
Standardize operational procedures and deployment activities.
Improve operational efficiency through automation and orchestration.
Project Delivery s Application Implementation Support
Serve as the technical infrastructure leads for IT projects involving new business applications, platforms, and services.
Collaborate with project managers, application owners, vendors, solution architects, and business stakeholders to define infrastructure requirements.
Design, build, provision, and configure Windows and VMware infrastructure to support application deployments and upgrades.
Participate in infrastructure architecture reviews, technical design workshops, and project planning sessions.
Perform infrastructure sizing, capacity planning, and performance assessments for new and existing applications.
Support application deployment activities across Development, Test, SIT, UAT,
Pre-Production, and Production environments.
Provide technical support during application testing, migration activities, and golive events.
Ensure new solutions meet infrastructure, security, backup, disaster recovery, and operational support requirements.
Coordinate infrastructure changes related to application releases, upgrades, migrations, and decommissioning activities.
Work closely with Network, Security, Database, Cloud, and Application Support teams to ensure successful project execution.
Develop implementation documentation, infrastructure build guides, and operational handover procedures.
Support infrastructure transformation projects including:
Data Centre migrations
Cloud migration initiatives
Operating System upgrades
Virtualization modernization projects
Infrastructure refresh programs
Participate in project governance meetings and provide technical status updates, risk mitigation plans, and implementation recommendations.
Leadership s Stakeholder Management
Provide technical leadership and mentoring to junior administrators and engineers.
Collaborate with cross-functional IT teams and external vendors.
Produce and maintain technical documentation, procedures, and operational runbooks.
Support audits, compliance reviews, and management reporting requirements.
Act as an escalation point for complex infrastructure and virtualization issues.
Required Qualifications
Education
Bachelor’s degree in Computer Science, Information Technology, Engineering, or a related discipline.
Master’s Degree is an added advantage.
Experience
Minimum of 8 years of experience managing enterprise Microsoft Windows Server environments.
Minimum of 5 years of hands-on VMware vSphere administration experience.
Experience supporting mission-critical data centre infrastructure.
Experience supporting enterprise application implementations and upgrades.
Experience working in large enterprise or multinational organizations.
Technical Skills
Microsoft Technologies
Windows Server 2016/2019/2022
Active Directory
Entra ID Azure Active Directory
DNS
DHCP
Group Policy
Windows Failover Clustering
PowerShell
Microsoft Azure
VMware Technologies
VMware vSphere
VMware ESXi
VMware vCenter
VMware HA
VMware DRS
VMware Lifecycle Manager
VMware vMotion
VMware Storage vMotion
VMware vSAN Preferred
Storage and Backup
Commvault
SAN/NAS Technologies
NetApp Storage
Monitoring and Security
Infrastructure Monitoring Tools
Microsoft Defender
Vulnerability Management Platforms
SIEM Integration
Security Hardening and Compliance Controls
Key Competencies
Enterprise Infrastructure Administration
Virtualization C Cloud Technologies
Infrastructure Architecture C Design
High Availability C Disaster Recovery
Advanced Troubleshooting C Root Cause Analysis
Project Delivery C Application Enablement
Technical Leadership C Mentoring
Stakeholder C Vendor Management
Strong Communication C Documentation Skills
Customer C Service-Oriented Mindset
Continuous Improvement C Automation
Success Measures
The successful candidate will be expected to:
Maintain infrastructure availability exceeding 99.9%.
Deliver timely resolution of infrastructure incidents and problems.
Successfully support project and application implementation activities.
Maintain secure, compliant, and resilient Windows and VMware environments.
Reduce manual operational effort through automation initiatives.
Support cloud transformation and infrastructure modernization programs.
Deliver reliable infrastructure services aligned with business objectives and IT strategy.
How to Apply
All application should be sent to info@vagangroup.com and make sure the subject of your mail is the position you are applying for.
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Source: MyJobMag